We get it. Not everyone has the space for a sprawling garden. Enter: topiary and espalier plants - perfect small-space gardening solutions. Topiary plants - like buxus - make for a fascinating living sculpture. Equally decorative are espalier plants, which are trained to grow flat against a lattice or other surface. Many of your favourite fruiting and flowering plants, including citrus, will happily grow as espalier plants. Best of all, you’ll still enjoy full size fruit and flowers.